一次突发性强降水过程成因分析  

Cause Analysis of a Sudden Heavy Rain Process

作　　者：冯晋勤 童以长 张治洋 林河富 

机构地区：[1]福建省龙岩市气象局,龙岩364000

出　　处：《气象科技》2007年第5期670-675,共6页Meteorological Science and Technology

基　　金：福建省科技厅社会发展重点项目"福建省交通气象灾害监测与防御对策体系的研究"(项目编号:2006Y0033)资助

摘　　要：利用常规观测资料、自动站、卫星云图、雷达回波等资料对2006年6月18日龙岩强降水过程进行成因分析。结果表明:有利的大尺度环流、充足的水汽条件和较强的上升运动,同时低层有冷空气入侵激发此次强降水的产生。强降水是由有利的中尺度地形中局地发展起来的中小尺度系统产生的。新一代天气雷达资料分析表明,对流单体有明显的典型的液态强降水系统特征。雷达资料风场反演表明风速辐合、切变等小尺度系统是产生短时强降水的成因。A heavy rain occurred in Longyan on 18 June 2006 is analyzed by using the data of routine observation, automatic weather stations, satellite pictures, and CINRAD/SA observations. The results show that the favorable environmental condition, ample water vapor condition, strong ascending movement and the invasion of weak cold air caused the heavy rainfall. The heavy rainfall was resulted from the local meso-and small-scale systems emerging from the meso-scale landform. The CINRAD/SA data indicate that the convective cells have the typical features of severe liquid precipitation. The retrieved wind field from radar data shows that the small-scale systems such as wind speed convergence and shear lines are the causes of short-range severe precipitation.

关 键 词：强降水 成因 中小尺度系统 风场反演 

分 类 号：P458.121[天文地球—大气科学及气象学]